Spark arrester



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S. E. DOUGLASS SPARK ARRESTER Filed April lO. 1922 A 2 Sheets-Sheet 1@Hornung July w, 1923!. www5 S. E. DOUGLASS SPARK ARRESTER Filed April10. 1922 2 Sheets-Sheet 2 To all whom t may concern:

Patented July 10,1923.

istat SPARK .linnnSrita.

Application filed April 10, 1922.` Serial No. 551,096.

Be it known that I, SAMUEL E. DoUGLAss, a citizen of the United States,residin at Raleigh, in the county of Wake and tate of North Carolina,have invented certain new and useful Improvements in Spark Arresters;and l dohereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

The invention has relationto the type of spark arresters designed moreparticularly for locomotives and contemplates the provision of means forcatching and retaining the sparks until the same may be safely disposedof without causing fire or annoyance.

ln accordance with the present invention, a baffle or deflector isdsposed within the flared delivery end of the smoke stack and branchesand terminates in conduits which lead to boxes in which the sparkscollect and cool and from which the accumulation is discharged asrequired.

Other objects and advantages will be apparent and suggest themselves asthe `nature o-f the invention is understood.

While the drawings illustrate an embodiment 'of the invention it is tobe understood that in adapting the same to meet different conditions andrequirements, various changes in the form, proportion and minor detailsof construction may be resorted `to without departing from rthe natureof the invention.

. Referring to the accompanying drawings forming a part `of theapplication,

Figure l is an elevation of portion of a locomotive provided with aspark arrester embodying the invention, I

Figure 2 is a transverse section of the body portionof the locomotive onthe line 2-2 of Figure l, showingl the parts on a larger scale, one ofthe boxes for receiving the sparks being in full lines.

Figure 3 is a sectional detail on the line 3--3 of Figure 2,

Figure 4 is fa horizontal section on the line 4-4 of Figure 2,. p

Figure 5 is a detail section on the line 5-5 of Figure 2, and

Figure 6 is a detail elevational -view of the spark arresting baffle ordeflector.

Corresponding and like parts are referredto in the following descriptionand designated in the several views of the drawings by like referencecharacters.

The numeral I designates the body of a locomotiveof any ordinary make ordesign andl 2the smoke stack which terminates in the flared end 3.` Ateach side of the body l is located a box 4 which is adapted to receivethe sparks or cinders escaping from the stack. The bottom and rear wallof the box 4 slope so as to readily discharge the contents through theopening formed in the front of the box and which is normally closed bymeans of a door 5. A pipe 6 leads upwardly from each of the boxes 4 andconveys the sparks and cinders thereto.

The spark arresting baffle or deflector is arranged within the smokestack and comprises a vertically disposed plate 7 and upwardly divergingplates 8 which terminate at their upper ends in elbows 9 which arecoupled to the pipe 6. The vertical plate 7 is centrally disposed withinthe lower portion of the stack 2 and is held in place by means of bolts10, or like fastening means.

The diverging plates 8 are provided with a pluralty of relatively smallopenings for the escape of smoke and gases, but which pr`cvent thepassage of sparks and cinders. The openings in the plate 8 may be of anyform and arrangement found most advantageous. The upper ends of theplates 8 have their opposite sideV portions curved inwardly andl yotherwise shaped to provide the elbows 9 which catch and direct thesparks and cinders into the pipe G. Inasmuch as the upper portions ofthe elbows 9 are subjected to abrasive action and wear, they are `madethicker to sustain such wear. i

` In the practical operation of the invention, the smoke and gases ladenwith sparks and cinders enter the stack 2 and are divided by thevertical portion 7 of the deflectbr and passing along the divergingplate 8 are subjected to a lateral deflection which effects a separationof the sparks and cinders from the smoke and gases, the latter passingthrough the openings of the plate 8 and the sparks and cinders beingarrested and directed into the elbows 9 and from thencey into the pipe 6by which they are conveyed to the boxes 4, in which they accumulate tobe discharged therefrom at intervals by openingthe door 5.

having its side edges'engagingthel inner Walls of the stack, a pairofflat' deieeting'- plates extending upwardly in cliverging` relationfrom the upper edge of Jche dividing plate and having their side edgescontaet- ,n

ing with the inner surface of the stack, the

delecting plates being perforated and erlnfV nating at. their upperendsinf; return elbows which overlie and engage Jche upper edge ofthe'stgaek and which are of 'a lengbhlequalto the Width ofthe deleetingplates,v the-inner end of the returnelbowl having openingscoexte'nsive'inlength with the-Width of the deflecting plates andlhaving their end Walls curved to engage the inner `surface of Jcheset-ack and thejouter ends,l of thetelbows ter,- minating in reducednipples,:1diseharg'e pipe throughfchel dividing plate and the smokestack, vsaidnneansinA addition to the engage` Lconneted to said nipples,andy means passing nient of the delecting plates and elbows i withthe-stack preventing the spark arresterl the stack.v

In testimony in presence. off vavvovv--tnesses` f SAMUEL EgDOUGr-lnss,

' Witnesses.: i f

x @IEDE ADOUGLASS J. R. LOWERY.

-frolnhaving a1iy.-niovement with respecuto whereof-I aix my'signa-,ture30

